Valve-spring-lifting device



Dec, 2, 1924.

M. J. BURKEL ET `A L. VALYE SFRING LIFTING DEVICE Filed Oct. l2', 1922Patented Dec. 2, 1924.

MATHEW J'. BURKEL AND LOUIS l?. FOSNOT, 0F AURORA, ILLINOIS.

VALVE-SPRING-LFTNG DEVICE.

Application filed october 12, 1922.

T all whom t may conce/m:

Be it known that we, MATHEW J. BURKEL and Louis P. FosNoT, citizens ofthe United States, and residents of Aurora, county of Kane, and State ofIllinois, have invented certain new and useful lmprovements in-Valve-Spring-Lifting Devices; and we do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, and to thc letters of referencemarked thereon, which form a part of this specilication. I

This invention relates to improvements in valve spring lifting devicesand consists of the matters hereinafter described and4 more particularlypointed out in the appended claims.

This invention relates especially to a valve lifting tool of the typeshown in an application, No. 483,685, filed by us on July 11, 1921. Theobject of the present invention is to further improve and simplify atool of the kind, whereby its manufacture and assembly is simplified;its efficiency is increased; and whereby the opening movement of thejaws may be arrested at variable distances between them and the jawswill become automatically locked in position and yet will be capable ofinstant and easy release when the work on the valve is completed.

The novel tool is of simple and economical construction and may be madeof stamped parts which are quickly and easily assembled. The manyadvantages of the improved tool will appear as we proceed with ourspecification.

In the drawings Fig. 1 is a view representing the improved valve springlifting device in side elevation with the jaws in approximately closedrelation.

Fig. 2 is a top plan view of the device.

Fig. 3 isa view representing a longitudinal central section through thedevice in a plane indicated by the line 8 3 of Fig. 2.

Figs. .Ll and 5 represent transverse sections through the device inplanes indicated respectively by the ylines 4-4 and 5 5 of Fig. 3.

Fig. 6 is a horizontal partial section through the device in a planeindicated by the line 6-6 of Fig. 3.

Fig. 7 is a detail plan view of a bit used in one of the jaws of thedevice.

serial no. 594,017.

The tool comprises in general two hand lever members pivoted togetherand adapted to be operated by one hand in the manner of the ordinarypliers; a pair of opposed jaw members; each carried by and operated byone of the hand lever members, means car ried by each hand lever memberand connected to its associated jaw member for maintaining the jaws atall times in parallel relation; and a trigger-controlled, automaticlocking mechanism adapted to lock the jaw members against closingmovement at a plurality of variable distances apart.

Referring now to that embodiment of the invention illustrated in thedrawings 10--10 indicate the opposed jaw members, each provided with abifurcated jaw 11 adapted to embrace the valve stem and having a flatpart 12 for engagement beneath the valve spring, with an approximatelysemi-circular upright shoulder 13 spaced back from the edge of the flatlpart for embracing the peripheral body of the spring.

The body ltof each jaw member is a straight, hollow bar, as shown, withupright, longitudinally extending side anges 15. The jaw member 11preferably extends laterally at an angle to the length of the body 14,so that the tool may be inserted for engagement with the valve spring atone side and back of any obstruction that may interferewith directaccess. The jaw members, when made as shown, may be fabricated from thesame blanks t-two forming dies, however, are required.

16-16 indicate two hand lever members which are similar in form to thehand levers of a pair of pliers. Each leverv is a flanged hollow bar'`comprising a main web 16a and depending side flanges 16".- Said flanges16b are provided near the forward ends of the levers, with fulcrum'parts 17-17 which extend some distance away from the web member 16a,and which are connected together by a horizontal fulcrumpin or rivet 18.Each jaw member 10 is connected intermediate its ends, by ahorizontalpin 19 to the forward end of its associated hand lever member,-thisconstruction permitting the jaw members to swing on the hand levermembers so as to be caused to maintain a parallel relation no matter howthe hand lever members are swung, the one upon the other.

To maintain the said parallel relation of the jaw members there areprovided two light, bell-crank levers -20, each pivoted by a horizontalpin 2l to one of the hand lever members and connected by a horizontalpin and slot connection at 22 to the rear end of the jaw member carriedby the said hand lever member. The bell-crank levers themselves arefulcrumed together on a horizontal pin 23 at a point midway between thetwo hand lever members and at the rear of the fulcrum pin 18 of saidlever. ll/lanifestly, when the hand lever members are swung towards oraway from each other, the bell-crank levers 20H20 will maintain the jawmembers in parallel relation, the fulcrum pin 23 of said levers movingtowards or away from the fulcrum pin 18 of the lever, depending on theway said hand levers are swung and the forward end of said bell-cranklevers swinging` on their pin and slot connection with the jaw members.

ln order to lock the jaw members at different distances apart, as thehand lever members are operated to swing them apart, there are providedtwo engaging latch members, namely, a fixed latch member 24 and apivoted latch member 25. The fixed latch member 24 is attached to onehand lever member and is provided with ratchet teeth 24a. The pivotedlatch member is carried by the other hand lever. lt is pivoted at 26 toand between the flanges 16b of said hand lever and is provided with oneor more teeth a adapted to engage the ratchet teeth 24a. The teeth aresuitably inclined so that the teeth of the pivoted latch member ortrigger will slide over the ratchet teeth 2st as the levers are operatedto open the jaws of the teeth. A spring 27 maintains the trigger inengagement with the ratchet. rlfhe trigger has a heel 28, which projectsthrough a slot 29 in the main web 16a of the associated hand levermember and is there provided with a linger piece or end to be engaged bythe thumb or linger to release the trigger when it is desired to closethe jaws together.

To partially close in the lratchet teeth of the latch mechanism and toprotect and prevent the lingers of the operator from being caught orengaged therein, we preferably provide plates 30-30 (see Figs. l and 6)which are placed on opposite sides of the space occupied by said latchmechanism. Said plates are secured in place by the bolt or .rivet 23,which is the fulcrum of the levers 20-20, and have their forward endsslotted as indicated at 30a so that they may engage on the fulcrum boltor pin 18 of the hand levers,-the slots in the ends permitting thenecessary movement of said plates as they move with the fulcrum pin 23of the hand levers, as heretofore described.

Since the tappets vary in diameter in different engines, we provide albit 32 adapted to be used with the one of the jaw members which isbrought into contact with the tappet. Such a bit is shown in plan viewin Fig. 7. lt consists of a flat plate cut 'to provide a narrow bar orstem 33 of the width between the side flanges of the hand lever membersand of a head 34 extending at the same angle to said narrow bar or stemas the jaws ll extend to the length of the members l0. The head 34fisbifurcated in like manner to the flat part ll of the jaw member, asindicated at 35. The bit has a notch or opening 36 which is narrowerthan that of the jaw member. l/Vhen the notch of the jaw member is toolarge to engage a part of the tappet, the bit 32 is inserted above thepin 19 and below the horizontal web l2 of the jaw member, with the head2A below the jaw proper. The advantages of such a bit will be apparent.

The operation of the device is manifest from the foregoing description.

While in describing the invention we have referred to certain details ofmechanical construction and arrangement of parts, it is to be understoodthat the invention is not limited thereto except as may be pointed outin the appended claims.

`We claim as our invention:

l. A valve spring lifting device, comprising two parallel jaw members,hand levers fulcrumed together between the said jaw members, and havingshort arms operatively connected to the front `ends of said jaw members,and auxiliary levers fulcrumed to each other intermediate their ends,each of said auxiliary levers having pivotal connection at one end witha hand lever and a pin and slot connection with the jaw member carriedby said hand lever.

2. A valve spring lifting device, comprising two parallel jaw members,hand levers fulcrumed together' between and near the rear ends of saidjaw members, and having short arms connected to the front ends of saidjaw men'ibers, and bell-crank levers fulcrumed together' at a pointbaclr of the fulcrum of said hand levers, each bell-crank lever havingpivotal connection with a hand lever at its rear end and, at its forwardend, a pin and slot connection with the rear end of the jaw membercarried by said hand lever.

3. A valve spring lifting device, comprising jaw members, hand leverscarrying said jaw members, and bell-crank levers fulcrumed to each otherand each operatively connecting a hand lever with a jaw member carriedthereby, each jaw member being a flanged bar having a bifurcated jawformed at one end and each hand lever being a lianged bar embracing itsjaw member and associated bell-crank lever, the flanges of the jawmembers extending in the opposite direction to the flanges of the handlevers.

4. A valve spring lifting device, comprising hand levers carrying saidjaw members, and bell-crank levers operatively connecting said jawmembers and hand levers to maintain the jaw members in parallelrelation, the jaw members and hand levers being flanged bars and thebell-crank levers being flat bars, the flanges of each hand leverembracing its associated jaw member, a rack bar fixed to one hand leverand eX- tending towards the other hand lever, and a spring controlledtrigger pivoted to said other hand lever normally engaged with said rackbar and having a heel which projects through an opening provided in saidlast named hand lever.

5. ln combination with a valve spring lifting device, including a jawmember having a bifurcated jaw, a bit having a similar, bifurcated headbut of different size, adapted to be removably engaged below said jaw.

6. ln combination with a valve spring lifting device, including a handlever, a

jaw member having a bifurcated jaw, a pin pivotally connecting said jawmember and said hand lever', and a bit having a similar bifureated headof' a different size and a stem adapted to be removably engaged betweensaid pivot pin and said jaw member.

7. A valve spring lifting device, comprising jaw members, hand leverscarrying said jaw members, and bell-crank levers fulcrnmed to each otherand each operatively connecting a hand lever with a jaw member carriedthereby. 4

In testimony that we claim the foregoing as our invention, we aHiX oursignatures in the presence of two witnesses, this 28th day of Sept. A.D. 1922.

LOUIS P. FOSNOT. MATHEW J. BURKEL. Witnesses:

N. J. HEINZ, WM. KANAUSKE.

